⚡ Bolt: Memoize SVG calculations in CircularProgressBar#30
⚡ Bolt: Memoize SVG calculations in CircularProgressBar#30google-labs-jules[bot] wants to merge 3 commits intomainfrom
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Wrapped the StarRating functional component in React.memo to prevent unnecessary re-renders. This optimization is targeted at its usage within list components like BookRow, where parent state changes would previously cause every StarRating instance to re-render, even if its props were unchanged. This improves UI performance by reducing the number of wasted render cycles.
…7328919 ⚡ Bolt: Memoize StarRating component to prevent re-renders
Refactors the `CircularProgressBar` from a class-based component to a functional component using React hooks. Introduces `useMemo` to cache expensive SVG geometry calculations (`center`, `radius`, `circumference`). This optimization prevents these values from being recalculated on every animation frame, improving rendering performance and reducing CPU load. Also fixes a regression introduced during the initial refactoring where the animation would incorrectly reset to zero when the target progress changed.
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💡 What
Refactored the
CircularProgressBarfrom a class to a functional component and memoized expensive SVG geometry calculations using theuseMemohook.🎯 Why
The component was recalculating SVG properties like
center,radius, andcircumferenceon every single frame of itsrequestAnimationFrameloop. This is inefficient as these values only change when thesizeorstrokeWidthprops change, which is rare.📊 Impact
This change prevents redundant computations on every animation frame, reducing the amount of work the browser has to do. This leads to a smoother animation, lower CPU usage, and a more efficient component, especially if multiple progress bars are rendered on the same page.
🔬 Measurement
The improvement can be verified by observing the component's behavior. The animation should be visually identical to the original. A code review of
frontend/src/Components/CircularProgressBar.jsconfirms that the expensive calculations are wrapped inuseMemowith the correct dependencies[size, strokeWidth]. Due to environmental constraints preventing the dev server from starting, a live performance profile could not be captured, but the code follows a standard and effective React optimization pattern.PR created automatically by Jules for task 16999876371506515580 started by @Smensink